BATTERY ENERGY STORAGE AND POWER SYSTEM

摘要

The disclosure relates to a battery energy storage 14 arranged to be connected to a direct current capacitor 13, which is connected in parallel to a power converter 12. The battery energy storage 14 comprises a battery module 15 and a controllable voltage source 16 adapted to inject a voltage opposite to a voltage ripple of the direct current capacitor 13. The disclosure also relates to a power system 10 comprising such battery energy storage 14 and a direct current capacitor 13.